Just and But
If just is context-free, then but is context-heavy. If just is biased toward action and simplification, then but is biased toward questioning and exploration. Just and but are polarities: you need both. Just has answers. But has questions.
...Justers and butters save lives in different ways: one by acting fast, and the other by preventing the adverse drug interaction. Put justers and butters together—provided they trust each other—and you're in good shape. Without trust, a juster and butter will just butt heads incessantly.